Citation: Lin Zhou, Xiao Hua Liu, Hai Xin Bai, Hong Juan Wang. A simple method for determining water content in organic solvents based on cobalt(II) complexes[J]. Chinese Chemical Letters, ;2011, 22(2): 189-192. doi: 10.1016/j.cclet.2010.09.015 shu

A simple method for determining water content in organic solvents based on cobalt(II) complexes

a College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China;
b College of Sciences, Henan Agricultural University, Zhengzhou 450002, China

Received Date: 31 May 2010

Fund Project: This work is supported by the National Natural Science Foundation of China (No. 20735003 and No. SKLEAC2010011) of State Key Laboratory of Electroanalytical Chemistry in China, the Projects (Nos. 30700348 and 30700349) Sponsored by the Scientific Research Foundation for the Doctors in Henan Agricultural University of China, as well as the support the Scientific and technological key project (Nos. 082102350006 and 102102310335) of Henan Province in China.

A method to determine water content in organic solvents was developed based on the color change of cobalt(II) nitrate in different solvents. The color-change mechanism and optimal conditions for determining the water content were investigated. The results showed that there was a good linear relationships between the absorbance of cobalt(II) complexes in organic solvents and water contents with γ in 0.9989~0.9994. This method has the advantages of low cost, good reproducibility, good sensitivity, simple in operation, fast in detection, friendly to the environment and no limitation on linear range for determining water content. It was used to determine water in samples with a satisfactory recovery in 97.81%~101.24%.
- Determination,
- Water content,
- Cobalt(II)nitrate,
- Organic solvent
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